148 



proportion than C. corrugatus : greatest breadth 0*32, least breadth 

 0*26. Operculum, of general character of that of C. corrugatus: 

 greatest breadth - 45, least breadth 0*41 ; whorls, about 10, much 

 closer approaching each other than in C. corrugatus, and spread of 

 margin much less ; slightly concave. Height 0'85, greatest breadth 

 1-07, least breadth 0-88. 



C. notatior. Chitty. St. Elizabeth. 



Form, colour, and sculpture much like C. corrugatus, finer in pro- 

 portion. Whorls 5, a slight depression only on upper part of last 

 whorl. Umbilical keel, not so distinctly raised, but broader in pro- 

 portion : greatest breadth 0*25, least breadth 0'2. Operculum, of C. 

 corrugatus character, slightly concave : raised lamina of 8 whorls, the 

 margin scarcely reflected. Height 0*59, greatest breadth 0*8, least 

 breadth 0'GI. 



C. notatior, var. a, Chitty. Yallahs Hill. 



Is much smaller and finer in sculpture, and the umbilical keel is 

 much less prominent in proportion. Height 0*4G, greatest breadth 

 0-61, least breadth 0-53. 



C. notatus, Chitty. Trelawny. 



Sculpture, fine and almost smooth, with a slight corrugation on 

 the upper part of latter half of the last whorl, which is devoid of de- 

 pression in its upper part. Umbilicus, greatest breadth '0 - 1 7, least 

 breadth 0*16. Umbilical keel, almost obsolete. Operculum, cha- 

 racter of C. corrugatus, more concave than preceding ; spiral la- 

 mina, about 8 whorls, upper margin scarcely reflected. Height 0*58, 

 greatest breadth 0*64, least breadth 0*56. 



C. nov^e-spei, Chitty. New Hope, Westmoreland. 



This shell is very much corrugated on the last, and a quarter of the 

 penult whorls, and eccentrically and very deeply round the umbilical 

 keel ; from all others of its size it may be distinguished, even in 

 worn shells, by the appearance of pits or indentations on its exterior, 

 as though the keel (which is very prominent) had been bitten into its 

 shape by pointed distant teeth. Umbilicus, greatest breadth - 24, 

 least breadth 0" 1 8. Operculum, character of C. corrugatus ; lamina 

 8 or 9 whorls, margin rather more broadly expanded and flattened 

 than in C. notatus, slightly concave. Height 0'63, greatest breadth 

 0-82, least breadth 0*71. 



C. cycloatus, Chitty. New Hope. 



Form, as usual. Colour, a broad band of rich brown-red extending 

 round above and below the periphery, whence its name — and above 

 and below, light dingy yellow. Sculpture, fine striae of growth on 

 upper three whorls, the remainder much coarser, corrugated below 

 the suture, and below that, pitted ; smooth and shining at the peri- 

 phery ; much pitted outside the umbilical keel, coarse lines of growth 

 inside umbilicus. Spire, much depressed. Whorls, 4-frds, well 



